Crutchfield Rewards

Deep discounts on car installation gear

With most stereo and speaker purchases, we offer installation guides, dash kits, wiring harnesses, and speaker accessories at deep discounts. Also, you can just buy our installation guides for $10. (If you buy a new stereo or speakers from us within 60 days, we'll apply the $10 to your order.)

Free Shipping on all orders $35 and up

We offer standard delivery in 3 business days or less.

Most orders received by 5PM ET (M-F) ship the same day.

Please see our shipping map below for estimated times.

Estimated standard delivery time to the U.S. and Puerto Rico

Delivery time estimates do not apply to large or heavy items that require special
shipping (including most TVs), items shipped directly from the manufacturer, or
out-of-stock items. Some items that ship from the manufacturer can only be delivered
to addresses within the 48 contiguous states.

Delivery time for standard shipping to any of the 50 U.S. states or Puerto Rico is 1-3 business days. Saturday, Sunday and national holidays are not considered business days for delivery purposes.

Newer model available

Our take on the Infinity Reference 5350aby Crutchfield's Buck Pomerantz

Infinity's Reference Series amplifiers offer impressive power and extensive controls for fine-tuning your sound — an ideal way to boost your music's intensity and clarity. Strict reliability testing results in durable, dependable amplifiers, and their compact size gives you more installation options in tight places.

Infinity's Reference Series amplifiers offer impressive power and extensive controls for fine-tuning your sound — an ideal way to boost your music's intensity and clarity. Strict reliability testing results in durable, dependable amplifiers, and their compact size gives you more installation options in tight places.

The versatile Infinity Reference 5350a 5-channel amplifier sends 50 watts RMS to each of your front and rear speakers with its 4-channel main power section, while its mono subwoofer channel delivers up to 300 watts to your subwoofers. And every Infinity Reference amplifier is certified to deliver power as advertised.

The sub channel can receive its signal directly from your car stereo's subwoofer preamp outputs or as a sum of the amp's front and rear input signals. You can operate this amp in 3-, 4-, or 5-channel modes, so this is one amp that you'll never outgrow.

The variable frequency filters and adjustable bass boost let you contour the amp's output to suit your speakers and subs for more efficient output and cleaner low-end kick. Direct-connect terminals make reliable connections without any crimping or soldering.

Infinity Reference 5350a

So far so good. Had to buy this to replace an amp from a Mercedes C240 with fiber optic cables. Will have to replace the power cable with a new one because the current one because the old one doesn't manage the amp's power well.

Pros:

Cons:

1 of 2 found this helpful

Infinity Reference 5350a

STIIL TRYING DIFFERENT COMBOS TO GET THE BEST SOUND, PERTTY EASY INSRUCTIONS , HAD TO LOOK THINGS OVER TO FIGURE IT OUT ,, OTHERWISE PRETTY GOOD , HEAVY , HAD TO PUT IT ON THE BACK WALL OF MY CHEVY S10 EX CAB , STILL WORKING WITH DIFFERENT COMBOS TO GET JUST THE RIGHT SOUND

Pros:EASY HOOK UP , HEAVY THOU, WORKS OK , STILL TRYING TO GET THE SOUND JUST RIGHT , TRIED DIFFERENT COMBOS TO GET SOUND RIGHT , WORKS PRETTY GOOD

Cons:WEIGHT

0 of 1 found this helpful

Good

Not a good value

LJS from Seattle, Wa on 3/28/2014

Purchased and installed Feb 2011 - This unit drives 4 Boston Acoustics 6 x 9 and a 10" subwoofer with a Kenwood Excelon series head unit. The amp has a somewhat large footprint but is offset by a low profile. Has a very flexible filtering system to tune the sound as desired. Unfortunately the right front channel has failed in just 36 months of use and for the money spent this is unacceptable. I would not recommend this unit at this time.

Poor performing..and Burnt OUT !

I HAD MY VEHICLE "OUTFITTED BY CRUTCHFIELD"... and purchased this unit accompanied by two sets of speakers and supplied an isoberic encloser (with a single 250 watt sub woofer inside). This amp performed descently for about 6 months then started humming out of nowhere ??? I rang out all circuits looking for possible faults and found nothing !! I concluded the issue by replacing the " Infinity 5030a Amp " with two Amps .. one amp to drive the 4 door speakers and a seperate amp to drive my subwoofer isoberic. This Infinity 5030a is " So Called Designed for a 5 speaker set up " ??? But it weak , not dependable and basically a rip off !!! If anyone needs one I'll be happy to give you my deffective " Infinity 5030a .. JUNK " ! ! ! This was the worst invested money I've ever blown away.

Pros:

Cons:

4 of 11 found this helpful

Questionable Reliability

NoBama from Morgantown, WV - Go Mountaineers !! on 12/3/2011

I liked the looks of this, the specs seem excellent, and it did put out good sound for about 18 months. It started hissing on me, I took it to an installer and they troubleshooted the entire system and narrowed it to the amp. Kind of an expensive piece to only get a year and 1/2 out of it. I am going back to Rockford, I have sold 3 cars that had them in it for years before I sold them and the RF's are probably still working.

Pros:I had been a big fan of Infinity speakers for many years so I figured I'd give an amp a try.

Cons:Didn't last long before needing replaced.

4 of 5 found this helpful

Nice Amp

Will from Redwood City, CA on 4/29/2011

Sounds good for its price and power range, I've been using for for over 2 years
without any issues.

Pros:

Cons:

2 of 3 found this helpful

Not a dependable piece of equiptment

Guy from San Fransisco on 11/26/2009

The amp would be wonderful. It worked well until just like another reviewer an internal defect caused one channel to quit working completely. Best to avoid Infinity amps completely in my experience. Other very cheap amps purchased at the same time as this one continue to work just perfectly. This one has been completely taken care of... Skip Infinity.

Pros:

Cons:

8 of 12 found this helpful

Good for 4 months....

Jason from Pomona, CA on 10/3/2009

Installed this amp in place of my good ol' JBL Power Series Amps (the best amps ever built! - but I had 3 of them) to save room. At first it was great! Then after 4 months the left rear channel developed a cold solder joint inside the amp. Now it is a super annoying piece of junk!
Since JBL and Infinity are the same company, I was hoping for another quality piece of equipment like my old P180.2, P80.2, and BP300.1. Those were quality Korean made! This is falling apart after a few months of use.

Pros:

Cons:

3 of 5 found this helpful

I like it!!

This amp replaced a old 4-channel. I decided to add a second set of coax drivers in my wifes 03 Mazda Protege.
The amp is driving a set of Polk db series 6x8's up front, db 6 1/2's in the rear doors and a set of 6x9 subs in the rear deck. All channels are at 4ohm load. Power is good and I love all the controls the amp gives ( hi/low crossover points, internal or external signal feed for the sub, etc.)
It is a big slab of metal, with no cooling fins, it has to be big. The amp handles the high volume well, but will require lots of room to breath (dont stick it under a seat). This one sits snug, in the left rear area of the trunk where its out of the way and the controls are easy to reach.
Great product.
Crutchfield rocks!!

Pros:

Cons:

3 of 3 found this helpful

Too big

I purchased this amp
for my 98 ford
explorer and it was
just way too big. If
you are like me and
want your amp to be
installed out of
sight but still want
full function of
your fold down
seats, stay away
from this amp. I did
get a chance to hear
it while it was
installed, and I was
not too impressed.
The highs come
across
WAY too sharp.

Pros:

Cons:

1 of 26 found this helpful

5350A Review

In my wife's 1994 Mazda Miata for a few years, I have been running a 4
channel 360w Alpine powering speakers in the headrest wired in serial to
get a stable 4 ohm load, Alpine DDC Separates in the Doors and the
tweeters off the deck thru the DDC crossover to the dash.
I also used an MTX 300D to power 2, 10" MTX Thunder subs in the trunk.
An older Sony electronic crossover did all my LP/HP stuff. With the Infinity I
could now get everything in one in the Miata trunk. I re-wired all the power
using a Street Wires kit and replaced the aging Alpine Deck with a new
Alpine iDA-X100. It even integrated with our AiNet older 12 disc CD Changer.
I also did a DynaMat job on the Sub enclosure that uses
the Miata trunk spare tire location as a cabinet.
My older mess is now pristine and with the subs running at 2 Ohms, The
Infinity has more than enough power for 2 subs. The 4 channel side has
made our car sound like it never has before with power to spare. I have
notice that the material and source driving the sub is crucial to the sound
(CD vs. iPod).
We look for quality not quantity, so the tight integration works well for us.
The X-Over features of the amp replace another piece of gear. Ziggy at
Crutchfield made the recommendation and we are quite happy with the
price vs. performance calculation. Thanks again Crutchfield!!! (Maybe they
will post the pictures)

Pros:

Cons:

11 of 11 found this helpful

Not Terrible

I bought this amp to power 4 Alpine SPS-17C2 and 2 JL 10w8's in a 4 Ohm load. The amp did a great job powering the alpines's at 50 watts per channel but struggled pushing the JL subs. I changed to 2 profile amps, 1 AP740 for the Alpine's and 1 AP100 for the JL's (480 watts bridged, stable at 4 ohms). The sound quality is just as good if not better from my Alpine's with the AP740 and my JL's are now pounding with the AP1000. Only issue I had with the Infinity 5350a is not enough power for the sub channel.

Pros:

Cons:

10 of 21 found this helpful

Fairly Pleased, Especially for the Price

Compared to buying two amps (a 4-channel plus a 2- or 1-channel), this is a bargain, especially when you consider additional wiring costs for the second amp. It's attractive and performs fairly well, with adjustability everywhere you need. My only complaint is the 150-watt subwoofer channel. Compared to 50 watts for the four regular channels, the subwoofer output is a bit on the weak side, so the door speakers have the potential to keep cranking up long after the sub tops out. The only cure would be to not use the sub channel and power my sub with a separate amp with more power. I'm not willing to do that just yet, which is the reason I bought a 5-channel amp in the first place. It's acceptable as is, but it would have been PERFECT with 50 watts x 4 channels + 350 watts x 1 channel. But still, for the money it's a great value.

Product Research

Features

CEA-2006 Compliant: CEA-2006 is a new system of testing and
measurement methods for mobile audio amplifiers. This voluntary standard advocates
a uniform method for determining an amplifier's RMS power output and signal-to-noise
ratio. The criteria for measuring power uses a DC input voltage of 14.4 volts and
the RMS power output is measured into a 4-ohm load, with 1% or less Total Harmonic
Distortion (THD) plus noise, and at a frequency range of 20 Hz to 20 kHz, when
applicable. Signal-to-Noise ratio is measured in weighted absolute decibels (dBA)
at a reference of 1 watt into 4 ohms. CEA-2006 allows consumers to compare car
amplifiers and receivers on an equal basis. The Infinity Reference 5350a under
CEA-2006 regulations is rated at 50 Watts RMS x 4 channels plus 150 x 1 channels
with a 85dBA signal to noise ratio.

Class AB and D Design: The Reference 5350a features a Class
AB design amplifier for the front and rear channels and a Class D design for the
subwoofer channel giving you the benefit of sound quality and efficiency.

5-Channel Design: The amplifier is designed to power four
full-range speakers and a subwoofer simultaneously. The amplifier's front and
rear channels can be bridged to two channels and configured to power two full-range
speakers and a subwoofer.

Line Level Inputs: The front, rear, and subwoofer channels of
the amplifier each have separate line-level RCA inputs with independent gain (Input
Sensitivity) controls. The Input Sensitivity controls will accept an input signal
of 100mV to 6.0 Volts. If you are using a receiver with only two pair of preamp
outputs you can run just one set of RCA for the front and rear channels and change
the rear channels input source to Front.

Protection Circuitry: The amp features 4-way protection, and
will shut itself down in the following cases:

DC Output: DC voltage is
detected on the amplifier output

Temperature: Amplifier is
overheated

Over/Under Voltage: Voltage
at the +12V (Battery) terminal is less than 8.5V
or more than 16V

Short Circuit: Short
circuit in speaker or speaker wire

Power and Protection LEDs: The amplifier features a Power and
Protection LED on top of the unit. The Power LED illuminates Green when the amplifier
is supplied power. The Protection LED will illuminate Red when the amplifier goes
into protect-mode.

Controls

Input Source:
There is an Input Source switch for the rear channel that
allows you to connect only one set of RCAs to the front and
rear channel inputs of the amplifier, if you only have two
sets of preamp outputs with one set already going to the
subwoofer preamp input on the amplifier.

Front, Rear and Subwoofer Input Levels:
Individual rotary controls for the front, rear and subwoofer
channels of the amplifier used to match the level of the preamp
output signal from your head-unit.

Internal/External Switch: This switch
allows you to select between using the amplifier's internal
subwoofer crossover or your headunit's built-in subwoofer
crossover.

Crossovers: The 5350a has built-in high pass and low pass
crossovers for the front, rear and subwoofer channels. The high pass and low pass
crossover's slope are 12 dB/octave and are continuously variable from 32Hz to 320Hz
and can be controlled independently for the front and rear channels. The
amplifier can also be operated at full-range simultaneously from both front and
rear channels. The subwoofer channel has a 12 dB/octave low pass crossover that is
continuously variable from 20 to 200Hz. The subwoofer channel cannot be operated at
full-range, it is set to low pass.

Crossover Mode Switches: Individual slide
switches for the front and rear channels used to select Low-Pass,
High-Pass or Full-Range configuration.

Crossover Frequencies: Independent rotary
controls for the front, rear and subwoofer channels to set the
cutoff frequency of the Low or High Pass Filter between 32 and
320 Hz for the front and rear speakers, and 20 to 200Hz for the
low-pass crossover of the subwoofer.

Bass Boost: The Bass Boost control allows you to enhance the
bass output of your system at 50Hz up to 6dB independently from the amplifier's
subwoofer channel.

Connections

Preamp Inputs: 3 pair of gold-plated
RCA jacks.

Remote Level Control: RJ-11 jack for use with the optional remote sub-level control
(sold separately).

IMS Input: This port is designed for
future Infinity expansion products.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

We have not received any answers from other customers on your question. I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They should be able to help answer your question.[ Krissy Jun 15, 2014 ] Staff